Electric Motor
Two Basic Methods Used For Braking a Motor (DC Injection and Dynamic)
Two common basic methods used for braking a motor are DC injection braking and dynamic braking. We will look at both in detail, starting with electric braking. DC Injection Braking Dynamic Braking DC injection braking is a method of braking… Read more
Apr 18, 2016 | By Edvard Csanyi
Energy and Power
You can use water pipes for grounding purposes, but…
Water pipes have been used extensively in the past as a grounding electrode. Water pipe connections are not testable and are unreliable due to the use of tar coatings and plastic fittings. City water departments have begun to specifically install… Read more
Apr 16, 2016 | By Edvard Csanyi
Electrical Lectures
Why do we care so much about power factor correction?
Power factor, as every electrical engineer should know, is defined as the ratio of real power to volt-amperes and is the cosine of the phase angle between the voltage and current in an AC circuit. These are neatly defined quantities with sinusoidal… Read more
Apr 15, 2016 | By Edvard Csanyi
Electrical Lectures
AC versus DC. Those were the days…
Take warning! Alternating currents are dangerous. They are fit only for powering the electric chair :) The only similarity between an AC and a DC lighting system is that they both start from the same coal pile. And thus did… Read more
Apr 13, 2016 | By Edvard Csanyi
Power Quality
5 anomalies in AC power that can damage your home devices
In addition to lightning, there are a number of other disturbances that can come in on the AC power lines and damage equipment. Some surge protectors can reduce or eliminate damage from some of these perturbations. There is considerable confusion… Read more
Apr 11, 2016 | By Edvard Csanyi
Energy and Power
What would be the best conductor material for electrical wires and cables
The conductivity of copper is 65% higher than that of aluminium which means that the conductor size of similarly rated cables is proportionately smaller. Correspondingly less expense is then incurred in providing for insulation, shielding and armouring the cables themselves…. Read more
Apr 09, 2016 | By Edvard Csanyi
Electrical Lectures
What Is The Energy, But For Real?
Energy is best defined as “the capacity for doing work”. Electricity is but one of many forms of energy. Other familiar forms of or descriptions of energy are thermal or heat, light, mechanical, and so on. Energy is also described… Read more
Apr 08, 2016 | By Edvard Csanyi
Energy and Power
Power Measurement On Four-Wire System Using Wattmeter Methods
A four-wire system is suitable to supply unbalanced, three-phase loads or single phase loads distributed on all three phases of a low voltage installation. When measuring power on a three-phase system, it is really necessary to take into consideration the… Read more
Apr 06, 2016 | By Edvard Csanyi
Energy and Power
The basics of selectivity (discrimination) between circuit breakers
On economical grounds and for the reason of reliability of the service, it is not always ideal to interrupt the supply to the installation in the case of a fault as fast as possible. That’s why we have the selectivity… Read more
Apr 04, 2016 | By Edvard Csanyi
Energy and Power
Six core activities in the commissioning of the earthing system
Commissioning of new earthing system is essential as a validation step for the design and installation process and for the design inputs. In most cases commissioning should measure the outputs of the earthing system in terms of produced voltages and… Read more
Apr 02, 2016 | By Edvard Csanyi
Industrial Automation
This is why every industrial plant MUST have an alarm system (for monitoring processes)
In industrial plants and installations, control systems are used to monitor and control processes. Control Systems, whether a conventional Control Desk or a Computer/PLCs System with SCADA or a Distributed Control System (DCS), provides a human-machine-interface to monitor and control… Read more
Apr 01, 2016 | By Edvard Csanyi
Maintenance
How to better understand transformer failures and maintenance necessity
Generally speaking, the transformer requires less care compared to other electrical equipment. But, as I already stated in some of the earlier technical articles, transformer failures can cause a huge problem in power system, since it’s one of the most… Read more
Mar 30, 2016 | By Edvard Csanyi
Energy and Power
10 Factors To Consider When Specifying Transformers
There are many factors that influence final specification of a transformer. However, the following ten factors MUST be considered when specifying transformers. Let’s name these ten factors: Kilovoltampere (kVA) Rating Voltage Ratings, Ratio, and Method of Connection (Delta or Wye) Voltage… Read more
Mar 28, 2016 | By Edvard Csanyi
Energy Efficiency
Here is why you MUST use variable speed drives in pumping applications
Pumping applications represent a significant opportunity for applying variable speed drives (VSDs) in new, as well as retrofit installations. The majority of pumping applications need to be controlled. It is unlikely that a pump will run continuously at a maximum… Read more
Mar 26, 2016 | By Edvard Csanyi
Energy and Power
How to manage harmonic currents affecting the neutral
A number of measures can be taken to eliminate or reduce the effects of harmonic currents in the neutral conductor, in particular third harmonic currents. Let’s talk about the following five measures: modifications to the installation, star-delta transformer, transformer with… Read more
Mar 25, 2016 | By Edvard Csanyi
